Depending on their frequency, radio waves can be absorbed by water and biological tissues (Bottomley & Andrew, 1978). They can also be shielded by metals due to the eddy currents. These effects constitute a huge problem for the implementation of radio frequency identification (RFID) systems in real environments. RFID systems can be classified into three different groups depending on the physics...

An operation scheme using electrical peaking and optical to engineer the modulation band of a Si microring modulator is presented. By incorporating an inductor design at metal traces modulator, driving signal can be magnified near frequency. Although adjusting wavelength detuning ring also introduces extend 3-dB roll-off frequency, inductive has no detrimental effect on low-frequency response. ...

Based on concepts from quantum thermodynamics the two-level system coupled to a single electromagnetic mode is analyzed. Focusing case of detuning, where frequency does not match transition frequency, effective energies are derived for levels and photon energy. It shown that these should be used energy exchange with fermionic bosonic reservoirs in steady state order achieve thermodynamically co...

The paper investigates the nonlinear modal interaction of longitudinal and flexural vibrations a beam resonator under periodic thermal loading. mode parametric oscillations is investigated conditions internal multiple resonance between some forms free resonator. possibility longitudinal-bending generation in system has been found, frequency slow envelope which essentially depends on parameter d...

Due to the radiation pressure, cavity optomechanical system can couple optical field with mechanical resonator, so state of resonator be regulated through field. Conversely, in also by modulating element. Therefore, many interesting phenomena, such as Fano resonance, optomechanically induced absorption and amplification, transparency, generated a system. Especially transparent windows, both dis...

Nonlinear energy sink (NES) refers to a typical passive vibration device connected linear or weakly nonlinear structures for absorption and mitigation. This study investigates the dynamics of 1-dof 2-dof NES with damping combined stiffness oscillator. For system NES, truncation failure frequency are revealed through bifurcation analysis using complex variable averaging method. The detuning inte...

Abstract We study the vortex formation in coupled atomic and molecular condensates a rotating double well trap by numerically solving Gross–Pitaevskii like equations. Starting with condensate potential we considered two-photon Raman photo-association for coherent conversion of atoms to molecules. It is shown that competition between atom-molecule coupling strength repulsive interaction controls...

We explore chiral magnonic resonators as building blocks of artificial neural networks. Via micromagnetic simulations and analytical modeling, we demonstrate that the spin-wave modes confined in exhibit a strongly nonlinear response owing to energy concentration when resonantly excited by incoming spin waves. This effect may be harnessed implement an neuron network. Therefore, propagating can s...

In this paper, the advantage of an adaptive damping system is presented. A damper with variable stiffness is tuned based on estimates of the real-time frequency response, facilitating optimal vibration mitigation. The performance of the developed routines is investigated on an existing tied arch railway bridge. Based on previous field measurements, resonant behaviour of several hangers was foun...

We present a detailed experimental study of photoluminescence upconversion in GaAs quantum wells over a wide temperature range. The dependence of the upconversion on the well width is discussed and the conversion efficiency is determined as a function of laser detuning. The best results are achieved when the laser detuning is comparable to the thermal energy of the system, ∆E ≈ 2kBT .